A STUDY ON THE FLAVONE CONTENT OF BUCKWHEAT

The highest flavone content of buckwheat is in its flowers, the mean value is as high as 7.4%. After flowering, the value will decrease gradually. The flavone content of buckwheat leaves is lower, its mean value is 5.3%, its highest peak appears at the stage of flowering, then decreasing slowly. The flavone content of buckwheat stems is the lowest, its mean value is 1.0%, no obvious change in the whole growth of the plant. Among the buckwheat grains, tatary buckwheat grains contain the highest flavone content, the mean value is 2.02%. The mean flavone content value in common buckwheat is only 0.23%. Radiative treatment scan increase the flavone content of buckwheat. The formation of flavonid compounds of buckwheat is mainly controlled by PAL activity